This short Article shows the basic Installation steps in installing OBIEE on your windows PC.
Pre-requisite

Computer with Windows XP (Home Basic) ,RAM 2GB, HDD approx 80 GB
JDK 1.5 installed and JAVA_HOME created.
Download the OBIEE setup from the http://www.Oracle.OTN.com. After downloading, I recommend to unplug the internet (turn off wireless internet or unplug the LAN wire )from your PC,this will make things more easy to do the setup.I dont recommend to put your PC connected to Internet during the installation.
0)You will need to install JDK 1.5 or higher to run OBIEE
Download JDK 1.5 (1.6 latest) and create JAVA_HOME
To create JAVA_HOME( Link )
Follow the steps to install the OBIEE (10.1.3.3.3) on Windows sytem.
1 ) select the Installation Location (default) C:\OracleBI
and select the Installation Type as ‘Basic’

2)Select the Setup type as ‘Complete’

3)specify where you have your Java’s Bin folder location
C:\ProgramFiles\Java\jdk1.6.0_06
Also set your Administrator password for Username oc4jadmin.

4) set the Account “LocalSystem” and the password

5) wait for some time the installation begins

6) the next screen show the Summary of items to be installed at specified location.

7) the installation begins showing the Progress on the Progress bar.Have some patience untill the installation is done.

After the Installation is completed .note the success message.

9)The Next screen shows the Installation Summary of OBIEE

10) Installation wizard asks you to restart your computer.

Congrats,you just completed the installation of OBIEE on your system.